31311122121100 has 36 divisors (see below), whose sum is σ = 70899271312464. Its totient is φ = 11979907593280.

The previous prime is 31311122121053. The next prime is 31311122121121. The reversal of 31311122121100 is 112122111313.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6806763379 + ... + 6806767978.

It is an arithmetic number, because the mean of its divisors is an integer number (1969424203124).

Almost surely, 2^{31311122121100} is an apocalyptic number.

It is an amenable number.

31311122121100 is an abundant number, since it is smaller than the sum of its proper divisors (39588149191364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31311122121100 is a wasteful number, since it uses less digits than its factorization.

31311122121100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13613531394 (or 13613531387 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 31311122121100 its reverse (112122111313), we get a palindrome (31423244232413).

The spelling of 31311122121100 in words is "thirty-one trillion, three hundred eleven billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred".